Alexandra Pais/The Star LedgerEdison mayor Antonia Ricigliano in this 2010 file photo. Ricigliano says the civil-rights case brought against the township has to do with issues that predate her administration.

EDISON — FBI agents and the Middlesex County Prosecutor’s Office were at the Edison municipal building Tuesday, collecting information that had been subpoenaed last month.

Federal agents gathered information about a civil-rights case filed against the township, said Richard Laird, the township’s assistant business administrator.

"It has to do with ongoing civil issues that predate this administration," said Laird. Mayor Antonia Ricigliano took office in January 2010.

Laird said the FBI was seeking information from the police department’s internal-affairs division.

The prosecutor’s office took over the division April 4, two weeks after Ricigliano suspended Police Chief Thomas Bryan on charges of insubordination and failing to carrying out her directives.

Prosecutor Bruce Kaplan, in a letter to Superior Court Judge Travis Francis, said he had taken over the division to ensure confidence in the law enforcement system.

Laird on Tuesday said the information the FBI was seeking is unrelated to issues surrounding the chief.